55420001 has 24 divisors (see below), whose sum is σ = 69569280. Its totient is φ = 43220736.

The previous prime is 55419929. The next prime is 55420039. The reversal of 55420001 is 10002455.

It is not a de Polignac number, because 55420001 - 2¹⁰ = 55418977 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55420201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93161 + ... + 93753.

It is an arithmetic number, because the mean of its divisors is an integer number (2898720).

Almost surely, 2^55420001 is an apocalyptic number.

It is an amenable number.

55420001 is a deficient number, since it is larger than the sum of its proper divisors (14149279).

55420001 is a wasteful number, since it uses less digits than its factorization.

55420001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705 (or 692 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 55420001 is about 7444.4610953379. The cubic root of 55420001 is about 381.2608189710.

Adding to 55420001 its reverse (10002455), we get a palindrome (65422456).

The spelling of 55420001 in words is "fifty-five million, four hundred twenty thousand, one".